Essays about: "tantalum"

Showing result 1 - 5 of 8 essays containing the word tantalum.

1. 1. The Impact of Country-Specific Contextual Factors on the Outcome of Section 1502 of the Dodd-Frank Act Regulating Conflict Minerals in the Democratic Republic of Congo

   University essay from Lunds universitet/Institutionen för handelsrätt

   Author : Oscar Andrzej Danysz; [2021]
   Keywords : Conflict minerals; DRC; adjoining countries; 3T; 3TG; Section 1502 of the Dodd-Frank Act; armed groups; tin; tungsten; tantalum; gold; US; due diligence; supply chains; unintended consequences; mining ban; embargo; artisanal and small-scale miners; implementation; policymakers; contextual factors; social; economic; political; Law and Political Science;

   Abstract : The conflict mineral crisis has been ongoing in the DRC for nearly two decades, with armed groups and increased military presence have played on the tin, tantalum, tungsten and gold to fund a brutal war across the eastern region of the country. Recent international efforts to tackle such illicit trade in conflict minerals has focused on requiring relevant stakeholders involved in the mineral sourcing from the DRC to adhere to due diligence processes on their supply chains in an attempt to identify conflict-sourced minerals. READ MORE

3. 2. Fluid inclusions and geochemistry of the Peña del Seo W-deposit, northwest Spain : Controlling mechanisms for tungsten deposition

   University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

   Author : Sara Bergström; [2020]
   Keywords : Greisen-system; fluid inclusion; tungsten; granite; northwestern Spain;

   Abstract : The Peña del Seo tungsten deposit in northwestern Spain is situated in the tin (Sn)-tungsten (W) metallogenic province of Europe − one of the richest tin-tungsten (tantalum-lithium) mineral provinces in the world. The European Union’s current goal is to become self-sufficient of these commodities in the near future and the iTARG3T project was launched in order to improve the understanding and provide innovative exploration methods of these types of deposits. READ MORE

4. 3. Evaluation of ALD Oxides as the Sensing Layer for Ion Sensors

   University essay from Uppsala universitet/Fasta tillståndets elektronik

   Author : Elis Nycander; [2016]
   Keywords : ;

   Abstract : In this thesis thin films of aluminium(III) oxide (Al2O3), titanium dioxide (TiO2), and tantalum(V) oxide (Ta2O5) were evaluated as the sensing layer for ion sensors. The oxide films were deposited using atomic layer deposition (ALD) and characterized with ellipsometry. READ MORE

5. 4. A Risk Assessment of Common Material Groups with Regards to their Content of Conflict Metals

   University essay from

   Author : Andreas Röckert; Holmberg Anders; Axel Nyberg; Jakob Holm Ovrén; Rebecka Lindberg; Viktor Djurberg; [2015]
   Keywords : Conflict minerals; Conflict metals; 3TG; Dodd-Frank Act section 1502; manual; functional amount; tin; Sn; tantalum; Ta; Tungsten; W; Gold; Au;

   Abstract : Trade involving tantalum, tin, tungsten and gold, summarized as "3TG", has during the last 15 years, contributed to the armed conflict in the Democratic republic of the Congo (DRC) and surrounding countries. These metals are also referred to as conflict metals or as conflict minerals. READ MORE

6. 5. CALPHAD study of cubic carbide systems with Cr

   University essay from KTH/Materialvetenskap

   Author : Zhangting He; [2015]
   Keywords : CALPHAD; cubic carbide; thermodynamics;

   Abstract : Cubic carbides (titanium, tantalum, niobium, and zirconium carbides) can constitute a significant proportion of so-called cubic and cermet grades, where it is added to substitute a portion of tungsten carbide. It is thus critical to understand and be able to thermodynamically model the cubic carbide systems. READ MORE